drive: Introduce DriveSystemServiceObserver

chrome/browser/chromeos/drive/drive_system_service.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/drive/drive_system_service.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 173 matching lines @@
       profile_sync_service->UpdateRegisteredInvalidationIds(
           this, syncer::ObjectIdSet());
     }
     profile_sync_service->UnregisterInvalidationHandler(this);
     push_notification_registered_ = false;
   }
 
   RemoveDriveMountPoint();
 }
 
+void DriveSystemService::AddObserver(DriveSystemServiceObserver* observer) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  observers_.AddObserver(observer);
+}
+
+void DriveSystemService::RemoveObserver(DriveSystemServiceObserver* observer) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  observers_.RemoveObserver(observer);
+}
+
 bool DriveSystemService::IsDriveEnabled() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   if (!IsDriveEnabledForProfile(profile_))
     return false;
 
   // Drive may be disabled for cache initialization failure, etc.
   if (drive_disabled_)
     return false;
 
@@ skipping 98 matching lines @@
   file_system_proxy_ = new DriveFileSystemProxy(file_system_.get());
 
   bool success = mount_points->RegisterRemoteFileSystem(
       drive_mount_point.BaseName().AsUTF8Unsafe(),
       fileapi::kFileSystemTypeDrive,
       file_system_proxy_,
       drive_mount_point);
 
   if (success) {
     event_logger_->Log("AddDriveMountPoint");
-    file_system_->NotifyFileSystemMounted();
+    FOR_EACH_OBSERVER(DriveSystemServiceObserver, observers_,
+                      OnFileSystemMounted());
   }
 }
 
 void DriveSystemService::RemoveDriveMountPoint() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
-  file_system_->NotifyFileSystemToBeUnmounted();
+  FOR_EACH_OBSERVER(DriveSystemServiceObserver, observers_,
+                    OnFileSystemBeingUnmounted());
 
   fileapi::ExternalMountPoints* mount_points =
       BrowserContext::GetMountPoints(profile_);
   DCHECK(mount_points);
 
   mount_points->RevokeFileSystem(
       util::GetDriveMountPointPath().BaseName().AsUTF8Unsafe());
   if (file_system_proxy_) {
     file_system_proxy_->DetachFromFileSystem();
     file_system_proxy_ = NULL;
@@ skipping 128 matching lines @@
   if (factory_for_test_.is_null())
     service = new DriveSystemService(profile, NULL, base::FilePath(), NULL);
   else
     service = factory_for_test_.Run(profile);
 
   service->Initialize();
   return service;
 }
 
 }  // namespace drive